Wrench.



W. NELSON.

WRENCH.

APPLICATION FILED APR. 14, 1915.

1,177,961. Patented Apr. 4,1916.

WALTER NELSON, OFATLANTIC, IOWA, ASSIGNOROF- ONE-HALF TO ALFRED A.. NELSON,

iinirnn STATE s PA E T orrron.

0F ATLANTIC, IOWA.

wnnncn.

To'all whom it may concern:

I Be it known that. I, IVALTER NELSON, a citizeniof the Unitedv States, and resident of Atlantic, in the county of Cass and State of Iowa, have invented a certain new and useful Trench, of which the following is a specification.

The object of my invention is to provide a. wrench of simple, durable and inexpensive construction.

A further object is. to provide a wrench having a movable jaw, and'also having a jaw adjustable to various positions, so that it may be. used as a pipe wrench or otherwise.

A further object is to provide such a wrenchlnwing simple and effective mechanism for controlling the positions of the movable members.

A further object is to provide such a device so arranged as to provide a great variety of adjustments for the slidable jaw,

and also provide strong and durable means for locking the adjustable jaw in any of its positions, which means are so constructed and arranged as to be readily moved to proper position for permitting the jaw to be moved to its open position. 7

My invention consists in the construction, arrangement and combination of the various parts of the device whereby the objects contemplated are attained as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 shows a side elevation of a wrench embodying my invention. Fig. 2 shows a detail sectional view taken on the line 2-2 of Fig. 3, and Fig. 3 shows a detail sectional view taken on the line 3-3 of Fig. 2.

In the exemplification of my invention, illustrated in the accompanying drawings, I have used the reference numeral 10 to indicate generally the main shank of the wrench, on one end of which is secured a handle 11 in any suitable way. On the opposite end of the shank 10 is a jaw 12 of suitable form. The upper surface of the shank 10 is provided with spaced rows of notches or teeth 13 and 1.4. Slidably mounted on the shank 10 is a jaw member 15, having a portion 16 extending toward the handle.

In the portion of the extension 16 of the jaw 15 adjacent to the shank 10 which is w Specification of Letters Patent;

Application filed April 14, 1915." Serial 110. 21,467. I

provided with the teeth 13 and 14:, is an openlng 17. In said opening aretwo pawls 18, having extensions 19 which project from the extension 16 toward the .handle 11. The:

pa-wls 18 are also provided with lugs 20 adapted to engage. the teeth 13 and 1. 1. Openings'21 extend from the opening 17 upwardly to the upper surface of the extension 16. Springs, 22 are secured to the upper surface of the extension 16 and extend downwardly through the openings 21, and yieldingly hold the pawls 18 in engagement with the teeth 13 and 14. The extensions 19 are close enough together, so thatboth of them may be conveniently raised with one finger. In this. connection it may be mentioned that the notches 13 and 11 of the two rows are staggered with relation to each other, and are made comparatively deep. By using the" two rows of notches, arranged in staggered relation, it is possible to secure deep notches, so that they are not likely to wear or slip with use, and at the same time securing a variety of adjustments greater than could be obtained where only one row of notches were made. It will be understood that with the notches and pawl so arranged,

- that the movable jaw 15 may be readily slid toward the jaw 12.

The portion 16 is provided with an extension 23 adapted to be engaged by the thumb of the user of the wrench for pushing the aws together. The thumb or forefinger can be placed under the extensions 19 for moving them away from the shank 10, for loosening the pawls from the notches, and for permitting the jaw 15 to be moved away from the jaw 12.

In the manufacture of wrenches embodying my invention, it is my purpose to provide one or the other or both of the jaws l5 and 12 with movable jaw members 24. As shown in the drawings, both of the jaws 15 and 12 are provided with such movable jaw members.

The adjacent faces of the jaws 15 and 12 are cut away at 25 and 26. Mounted in the cut away portions are the movable jaw members 24, which are pivoted at their upper ends and are provided with roughened or corrugated adjacent faces 27. The movable jaw members 2 1 are provided in their lower portions with slots 28.

Suitably mounted in the jaw members 15 and 12 respectively, are shafts 29 having sol their central portions 30 reduced in size and arranged ofi' center so as to give a crank motion to the members 30 when the shafts 29 are revolved. The outer walls of the sides of the jaws 15 and 12 are provided with recesses 31, adapted to receive and permit movement of the handles 32 on the shafts 29.

The movable jaw members 24 are'so ar-.

ranged that in one of their positions, their corrugated faces 27 are flush with the adjacent faces of the respective jaws l5 and 12, while when the shafts 29 are rotated by means of the handles 32, the crank motion of the portions 30 will cause parts of the jaw members 2% to project into the space between the jaws 15 and 12. The position thus assumed by the jaw members 24 is illustrated for the righthand member 24 by dotted lines in Fig. 2.

In the practical operation of the Wrench where it is desired to use the wrench as a pipe wrench or the like, one or the other of the movable jaw members 24 is moved to its position extended into the space between the jaws l5 and 12, whereupon a pipe may be gripped in the ordinary way. It will be noted that either of the members 2% may be so used, or that both may be used together, thus making it possible to employ my improved wrench in a variety of locations and under a great variety of conditions.

Some changes may be made in the arrangement and construction of the parts of my improved wrench without departing from its essential features and purposes, and I it is my intent to cover by this application any such changes which may be included I within the scope of my claims.

I claim as my invention.

'1. In a wrench, a shank, a fixed jaw member, a movable jaw member, one of said jaw members having a slot, a movable jaw mem ber pivotally received in said slotand adapted to move from position entirely received in the slot to positionvextending into the space between the first two jaw members, i said second movable jaw member having an elongated. slot, a cylinder mounted. in the jaw member, adjacent to said" second movable jaw member for rotation, and a pin extending ofi center from said cylinder and received in said elongated slot.

2. In a wrench, a shank having opposite jaw members, one of said jaw members be ing provided with a slot opening toward the other jaw member, a movable member piv oted in said slot and adapted in one of its positions to move into the space between. the first two jaw members, said pivoted member having an elongated slot, and a member travelingin said slot and carrying means to move said pivoted jaw member on its pivot.

- Des Moines, Iowa, March 27, 1915.-

V WVALTER NELSON. Witnesses A. A. NELSON, L. B. NELSON.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of. Patents.

Washington, D. C. i 

